Abstract
To investigate the effect of Gd x SrO: CdO (x = 0.1, 0.3, 0.4) nanostructures (NS), in the present work an attempt has been made to synthesize Gdx SrO:CdO NS by co precipitation method. Structural properties were investigated by XRD (X-ray diffraction), FTIR (Fourier transform infrared spectroscopy), SEM (scanning electron microscopy), UV-Visible, XPS (X-ray photoelectron spectroscopy). XRD indicates having mixed phase of tetragonal crystal structure and SEM images indicate spherical shaped nanoparticles (NPs) of Gd x SrO:CdO with average size laying in between ~100 nm to ~130 nm. FTIR spectra of Gd x SrO: CdO NS show stretching and bending peaks of Gd-O-Gd, Cd-O-Cd and Sr-OH at ~1311 cm −1, ~1486 cm −1, ~ 3300 cm −1 and UV-visible optical absorptivity of Gd x SrO:CdO show absorption maxima shift from 330 nm to 324 nm (blue shift) and edges at 352.4 nm, 348 nm and 346.3 nm respectively for Gd concentration varying between 0.1, 0.3 and 0.4. binding energies of the Gd 3d 3/2, Sr 3d 3/2 and Cd 3d 3/2, O1s and C1s observed at 150.8 eV, 141.6 eV, 410.1 eV, 529.6 eV and 282.4 eV respectively which confirms the chemical composition of NS. Photoluminescence (PL) spectrum of Gd 0.4 Sr 0.5 O Cd 0.1O NS exhibit broad peaks from 338 nm to 397 nm centred around 369 nm with various Gd, O, Sr and Cd related native defects. Emission band observed at UV- Visible region for Gd 0.3 Sr 0.5 O Cd 0.2 O NS PL emission spectra has two emission peaks at 369 nm (UV region) and 550 nm (Visible region). The transitions can be ascertained with shielding of 4f shells of Gd+3 ions by 6 s, 5d shells by the interaction of the other Gd+3 ions.
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All data generated or analysed during this study are included in this published article [supplementary information files].
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Acknowledgements
Authors are thankful to IIT Kanpur for SEM and XPS analysis, Ranichennamma University for XRD and elemental compositional analysis, KUD, Dharwar for SEM EDX analysis.
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Dr. Vinayak Adimule and Dr. Debdas Bhowmik contributed synthesis, manuscript preparation and communication. Dr. Yallur BC involved in characterization of the samples, Mr. Santosh S Nandi acknowledged for SEM, EDX and XRD analysis and partly by manuscript preparation. Mr. Adarsha H.J. Gowda carried out PL experimentation and interpretation of the results.
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Adimule, V., Nandi, S.S., Yallur, B.C. et al. Optical, Structural and Photoluminescence Properties of Gd x SrO: CdO Nanostructures Synthesized by Co Precipitation Method. J Fluoresc 31, 487–499 (2021). https://doi.org/10.1007/s10895-021-02683-7
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DOI: https://doi.org/10.1007/s10895-021-02683-7